Laser Particle Sensor Module PM2009 Application Air purifier, air quality monitor Ventilation system, air conditioner with purifying function Auxiliary product of consumer electronic products Environmental monitoring Handheld air quality detector Description PM2009 laser particle sensor module use light scattering principle, to measure and calculate the suspending particle number which is within unit volume on the air exactly. Then output particle mass concentration by mathematical algorithm and scientific calibration. Working principle Sampling by the internal pressure which occurs by fan, when sampling particles pass through light beam (laser), there will be light scattering phenomenon. Scattered light will be converted into electrical signal (pulse) via photoelectric transformer. The bigger particles will Cubic particle sensor module specification Measuring particle range 0.3 ~ 10 μm Measurement range 0-500μg/m³ Resolution 1μg/m³ Consistency Error for 0~100μg/m³ ±15μg/m³ PM2.5 101 ~500μg/m³ ±15% reading Test dust Cigarette Data refresh frequency 1s Preheating time 8 s Working -10 ~ +60 obtain stronger pulse signal (peak value). Through peak Working humidity 0~95%RH (non-condensing) value and pulse value quantity concentration of particles in each size can be calculate. Thus, real-time measured data is obtained through measuring quantity and strength of scattered light. Storage -20 ~+85 Nominal voltage DC (5.0±0.1)V,ripple wave <50mV Current <100mA; Standby current <20mA 1. UART_TTL(3.3V/5V, default) Main features The smallest size of available measurement: 0.3μm Three types of optional signal output Four types of optional measuring mode High sensitive and quick response Super slim design,light weight, easy for installing. Signal output Output method Dimension MTTF 2. I²C (3.3V/5V, default) 3. PWM (Customized) Data output is passive response, output interval is 1000ms 50mm*38mm*21mm 37297h (continuous turn on)
Internal architecture description According to above Block Diagram, the air sampling of sensor is consist of fan and drive electric, the light source is consist of laser diode and drive electric, the detecting part is consist of light sensitive tube and amplifying circuit. Air enter into the module by fan sampling, the light from laser diode will be scattered by particles and will be tell out by light sensitive equipment, then convert into electronic signal. Electronic signal is disposed by filter circuit and MCU, Then output particle mass concentration.
Configuration structure and I/O definitions I/O definitions No. PIN Description 1 VCC Power input(+5v) 2 GND Power input (ground terminal) 3 SET Set (TTL level @3.3V,high level or floating is normal working status, while low level is sleeping mode) 4 RX/SDA UART-RX / I²C SDA(TTL level @3.3V),compatible with 5V communication 5 TX/SCL UART-TX / I²C SCL(TTL level @3.3V),compatible with 5V communication 6 RESET Reset/ TTL level @3.3V, low reset 7 NC Impending(Do not connect) 8 CTL Output mode exchange TTL level @3.3V High level or floating is UART communication mode, low level is I²C communication mode Connector description (Can be customized) Item Pin spacing Brand JST SM08B-GHS-TB 1.25 mm pitch JST
Typical application circuit Application 1:UART TTL 3.3V UART output Application 2:I²C serial output
Note of circuit design: UART and I²C communication is compatibility with 3.3V and 5V level. There is pull-up resistor inside the SET and RESET. No matter there is signal input or not, these two pins will work normally. If they are not useful for you, keep it floating. PIN7 is the pin for manufacturer testing, you can keep it floating. The power supply of sensor should be 5V and low noise, please refer to table 1 for details. Temperature influence curve Particle measured error: under 25±2,0~1000μg/m³, consistency and accuracy of PM2.5 is either ±15% reading or ±15μg/m³, use the biggest value Temperature influence coefficient: 0.5%/ ~ 1%/ or 0.5μg/m³/ ~ 1μg/m³/, use the biggest value
Reliability test Test Item Test Condition Standard Sample qty: N Defective qty: C Normal performance Temperature influence Low performance The indoor should be: 25±2, and humidity is (50±10)%RH,Measuring in different particle environment after powering on Operating the sensor in different condition :-10±2, 0±2, 10±2, 20±2, 30±2, 40±2, 50±2 to measure the error of the sensor after powering on. The indoor should be: -10±2. Measuring in different particle environment after powering on. Consistency error: 0-100μg/m³: (±15μg/m³) 101-1000μg/m³: (±15% of reading) n=10 Measurement error satisfies the requirement of curve Measurement error satisfies the requirement of curve High performance Low humidity The indoor should be: 50±2,Measuring in different particle environment after powering on Operating the sensor in the ambient of 25±2,( 30±5)%RH to measure the error of the sensor in different particle Measurement error satisfies the requirement of curve PM2.5 Consistency error: 0-100μg/m³: (±15μg/m³) n=10 performance environment 101-1000μg/m³: (±15% of reading) High Operating the sensor in the ambient of 25±2,( 80±5)%RH PM2.5 Consistency error: humidity to measure the error of the sensor in different particle 0-100μg/m³: (±15μg/m³) performance environment 101-1000μg/m³: (±15% of reading) Low storage Leave the sensor in the ambient of -20 ±2 for 500 hours after powering off. Then measuring the error of the senor in normal The sensor works normally after 2 High storage. Leave the sensor in the ambient of 60 ±2,(50±10)%RH for 500 hours after powering off. Then measuring the error of the senor in normal The sensor works normally after 2 Low working Leave the sensor in the ambient of -10±2, max voltage (within range of acceptable working voltage) for 500 hours. Then measuring the error of the senor in normal The sensor works normally after 2 High working Leave the sensor in the ambient of 50±2, max voltage (within range of acceptable working voltage) for 500 hours. Then measuring the error of the senor in normal The sensor works normally after 2 Thermal impact Leave the sensor in ambient of -20 for 55 mins then move it to ambient of +60 within 5 mins for another 55 mins. Keep this cycle for 10 times. Powering off when testing. The sensor works normally after 2 High and high humidity Operating the sensor in the ambient of 50±2,80~85%RH, max voltage (within range of acceptable working voltage), for 500 hours. The sensor works normally after 2 operation
Vibration test 10-55-10Hz/min, with amplitude of 1.5mm, vibrate in X,Y,Z direction, each direction for 2 hours. 1)The sensor works normally after 1 2)Wire terminals without loss Drop test Drop the sensor from 1 m height down to the hard wooden board randomly for three time The sensor works normally Salt spray test According to GB/T2423.17-2008, leave the sensor in the 35 salt-fog cabinet, spray it with 5% sodium chloride saltwater for 24 hours. Using water to clean the sensor after test. No red rust on the sensor surface Switch testing In normal, leave the sensor with powered-on 5 mins and powered with 5 mins to test for 500 hours repeatedly for The sensor works normally High level Operating the sensor continuously for 24 hours in the ambient The sensor works normally after 1 particle test of 10mg/m³ hour in the ambient. Vibration test 10-55-10Hz/min, with amplitude of 1.5mm, vibrate in X,Y,Z direction, each direction for 2 hours. 1)The sensor works normally after 1 2)Wire terminals without loss Drop test Drop the sensor from 1 m height down to the hard wooden board randomly for three time The sensor works normally Salt spray test According to GB/T2423.17-2008, leave the sensor in the 35 salt-fog cabinet, spray it with 5% sodium chloride saltwater for 24 hours. Using water to clean the sensor after test. No red rust on the sensor surface Switch testing In normal, leave the sensor with powered-on 5 mins and powered with 5 mins to test for 500 hours repeatedly for The sensor works normally High level Operating the sensor continuously for 24 hours in the ambient The sensor works normally after 1 particle test of 10mg/m³ hour in the ambient.
Sensor dimension Dimension description of sensor Unit: mm
Ordering Information PM 2 0 09 Structure type 09:structure number Application 2:Civil laser Product type PM:Particle sensor
Packing information Packing method Per layer qty Layers Packing qty Carton dimensions Packaging material 30pcs 13 layers 390 W395 * L310 * H480 mm Red pearl cotton (ESD)
User attention PM2009 laser particle sensor module is for household electronics products. For application of medical, mining, disaster preparedness, which need high security and high dependence, this sensor is not suitable. Please do not use it in bad dusty environment. Avoid using the sensor under situation with strong magnetic, such as situation close to stereo speaker, microwave oven, induction cooking. When install PM2009 sensor module in your system or equipment, please make sure of unobstructed air-inlet and air-outlet. And there is no huge airflow faced to air-inlet and air-outlet. Correct installation position as below for reference: There is no high voltage transient protection circuit, the power supply should be 5V with stable and low noise. Please reference to table 1 The power supply for the sensor is 5 V because that the fan should be drove under 5V. But it is 3.3 V communication to work as high level electricity for other data communication interface and pin. So the main board MCU is 3.3V communication level. If main board MCU is 5V communication level, then should add an external 5V switch to 3.3V level on the communication pi n (RX,TX) and controlled pin (RESET), to switch components and circuit. Please reference to table 2. When RC is used to reduce voltage, be cautious that the metal shell will be connected with either 220VAC live wire or the neutral wire. Load
Note If isolated switch power supply is adopted to obtain DC power, please control the capacitance between the DC ground and the AC ground below 2.2nF and withstand voltage reaches to 3KV. The sensor itself is safe to use, what you should be cautious is the safety of power supply and structure design on the sensor. After-sales services and consultancy Wuhan Cubic Optoelectronics Co., Ltd ADD: Fenghuang No.3 Road, Fenghuang Industrial Park, Eastlake Hi-tech Development Zone, Wuhan 430205, China TEL: 86-27-81628827 FAX: 86-27-87401159 Http://www.gassensor.com.cn E-mail: info@gassensor.com.cn